Extrinsic 3746-1

{
  "heartbeat": {
    "blockNumber": 3745,
    "sessionIndex": 62,
    "validatorsLen": 4,
    "authorityIndex": 2
  },
  "signature": "0xca98abfb1959a7b961517767ebc09392c1a3c966cbefa08bebd303c9d293dc3afaa5e8dbadc759defd05f55caa6cdbd02e202002cc70e96189a4a7428a827386"
}